diff --git a/units/adc/_adc_init.c b/units/adc/_adc_init.c
index 6ce4b31..98aad8b 100644
--- a/units/adc/_adc_init.c
+++ b/units/adc/_adc_init.c
@@ -133,6 +133,11 @@ error_t UADC_init(Unit *unit)
             dbg("!! Need at least 1 channel");
             return E_BAD_CONFIG;
         }
+
+        if (priv->dma_buffer_size < priv->nb_channels*2*2) {
+            dbg("Insufficient buf size");
+            return E_BAD_CONFIG;
+        }
     }
 
     // ------------------- ENABLE CLOCKS --------------------------